package com.interest.util;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Writer;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

import com.alibaba.fastjson.JSONObject;
import com.interest.bean.message.Article;
import com.interest.bean.message.resp.ImageMessage;
import com.interest.bean.message.resp.MusicMessage;
import com.interest.bean.message.resp.NewsMessage;
import com.interest.bean.message.resp.TextMessage;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.core.util.QuickWriter;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
import com.thoughtworks.xstream.io.xml.PrettyPrintWriter;
import com.thoughtworks.xstream.io.xml.XppDriver;

public class MessageUtil {
	   /** 
     * 返回消息类型：文本 
     */  
    public static final String RESP_MESSAGE_TYPE_TEXT = "text";  
  
    /** 
     * 返回消息类型：音乐 
     */  
    public static final String RESP_MESSAGE_TYPE_MUSIC = "music";  
  
    /** 
     * 返回消息类型：图文 
     */  
    public static final String RESP_MESSAGE_TYPE_NEWS = "news";  
  
    /** 
     * 请求消息类型：文本 
     */  
    public static final String REQ_MESSAGE_TYPE_TEXT = "text";  
  
    /** 
     * 请求消息类型：图片 
     */  
    public static final String REQ_MESSAGE_TYPE_IMAGE = "image";  
  
    /** 
     * 请求消息类型：链接 
     */  
    public static final String REQ_MESSAGE_TYPE_LINK = "link";  
  
    /** 
     * 请求消息类型：地理位置 
     */  
    public static final String REQ_MESSAGE_TYPE_LOCATION = "location";  
  
    /** 
     * 请求消息类型：音频 
     */  
    public static final String REQ_MESSAGE_TYPE_VOICE = "voice";  
  
    /** 
     * 请求消息类型：推送 
     */  
    public static final String REQ_MESSAGE_TYPE_EVENT = "event";  
  
    /** 
     * 事件类型：subscribe(订阅) 
     */  
    public static final String EVENT_TYPE_SUBSCRIBE = "subscribe";  
  
    /** 
     * 事件类型：unsubscribe(取消订阅) 
     */  
    public static final String EVENT_TYPE_UNSUBSCRIBE = "unsubscribe";  
  
    /** 
     * 事件类型：CLICK(自定义菜单点击事件) 
     */  
    public static final String EVENT_TYPE_CLICK = "CLICK";  
    
	
	
	public static Map xmlToJson(HttpServletRequest request) throws Exception{
		 // 将解析结果存储在HashMap中  
	    Map<String, String> map = new HashMap<String, String>();  
	    // 从request中取得输入流  
//	    InputStream inputStream = request.getInputStream();  
	    // 读取输入流  
	    SAXReader reader = new SAXReader();  
	    Document document = reader.read(request.getInputStream());  
	    // 得到xml根元素  
	    Element root = document.getRootElement();  
	    // 得到根元素的所有子节点  
	    List<Element> elementList = root.elements();  
	  
	    // 遍历所有子节点  
	    for (Element e : elementList)  
	        map.put(e.getName(), e.getText());  
	  
	    return map;  
	}
	
	  /** 
     * 文本消息对象转换成xml 
     *  
     * @param textMessage 文本消息对象 
     * @return xml 
     */  
    public static String textMessageToXml(TextMessage textMessage) {  
        xstream.alias("xml", textMessage.getClass());  
        return xstream.toXML(textMessage);  
    }  
    
    public static String imageMessageToXml(ImageMessage imageMessage) {  
        xstream.alias("xml", imageMessage.getClass());  
        return xstream.toXML(imageMessage);  
    }
  
    /** 
     * 音乐消息对象转换成xml 
     *  
     * @param musicMessage 音乐消息对象 
     * @return xml 
     */  
    public static String musicMessageToXml(MusicMessage musicMessage) {  
        xstream.alias("xml", musicMessage.getClass());  
        return xstream.toXML(musicMessage);  
    }  
  
    /** 
     * 图文消息对象转换成xml 
     *  
     * @param newsMessage 图文消息对象 
     * @return xml 
     */  
    public static String newsMessageToXml(NewsMessage newsMessage) {  
        xstream.alias("xml", newsMessage.getClass());  
        xstream.alias("item", new Article().getClass());  
        return xstream.toXML(newsMessage);  
    } 
    
    public static class mydriver extends XppDriver{
    	@Override
    	public HierarchicalStreamWriter createWriter(Writer out) {
    		return new PrettyPrintWriter(out){
    			// 对所有xml节点的转换都增加CDATA标记  
                boolean cdata = true;  
                @Override
                public void startNode(String name) {
                	// TODO Auto-generated method stub
                	super.startNode(name);
                }
                
                @Override
                protected void writeText(QuickWriter writer, String text) {
                	  if (cdata) {  
                		  writer.write("<![CDATA[");  
                          writer.write(text);  
                          writer.write("]]>");  
                	  }else{
                		  writer.write(text);
                	  }
                }
    		};
    	}
    }
    
    /** 
     * 扩展xstream，使其支持CDATA块 
     *  
     * @date 2013-05-19 
     */  
    private static XStream xstream = new XStream(new mydriver());  
}
